O

O

• Obregonia
• Ochagavia
• Ochna
• Ocimum
• Odontioda
• Odontocidium
• Odontoglossum
• Odontonema
• Odontonia
• Oemleria
• Oenanthe
• Oenothera
• Olea - Olive
• Olearia
• Olneya
• Olsynium
• Omphalodes
• Omphalogramma
• Oncidium
• Onoclea
• Ononis
• Onopordum
• Onosma
• Oophytum
• Ophiopogon
• Ophrys
• Ophthalmophyllum
• Oplismenus
• Opuntia
• Orbea
• Orbeopsis
• Orchis
• Oreocereus
• Origanum
• Orixa
• Ornithogalum
• Ornithophora
• Orontium
• Orostachys
• Oroya
• Ortegocactus
• Orthophytum
• Orthrosanthus
• Orychophragmus
• Oryza
• Osbeckia
• Osmanthus
• Osmarea
• Osmaronia
• Osmunda
• Osteomeles
• Osteospermum
• Ostrowskia
• Ostrya
• Othonna
• Ourisia
• Oxalis
• Oxydendrum
• Ozothamnus

Liatris

Liatris (common names: Blazing-star, Gay-feather or Button snakeroot) is a genus of ornamental plants in the Asteraceae family. These plants are used as a popular summer flowers for bouquets.


Speciesmore >>>

Magnolia Tree and Flower

Magnolia is a large genus of about 210 flowering plant species in the subfamily Magnolioideae of the family Magnoliaceae.

The natural range of Magnolia species is rather scattered and includes eastern North America, Central... more >>>

Mammillaria

The genus Mammillaria is one of the largest in the cactus family (Cactaceae), with currently 171 known species and varieties recognized. Most of the mammillarias are native to Mexico, but some come from the southwest USA, the Caribbean,... more >>>

Knightia

Knightia is a small genus of the family Proteaceae.


Species
Knightia excelsa, Rewarewa in Maori, or New Zealand honeysuckle, is an evergreen tree endemic to the low elevation and valley forests of New... more >>>

Genista

Genista is a genus of legumes which includes many species of broom. Many of these brooms are notorious as noxious weeds.


Selected species
Genista aetnensis or Mount Etna Broom is a large shrub or small... more >>>